1 files changed, 47 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.asm b/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.asm
new file mode 100644
index 0000000000..d835543767
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibMmx/X64/SetMem32.asm
@@ -0,0 +1,47 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation
+; All rights reserved. This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+;   SetMem32.asm
+;
+; Abstract:
+;
+;   SetMem32 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    .code
+
+InternalMemSetMem32 PROC    USES    rdi
+    DB      49h, 0fh, 6eh, 0c0h        ;  movq    mm0, r8       ; mm0 <- Value
+    mov     rax, rcx                                            ; rax <- Buffer
+    mov     rdi, rax
+    mov     rcx, rdx
+    shr     rcx, 1                                      
+    jz      @SetDwords
+    DB      0fh, 70h, 0C0h, 44h        ;  pshufw  mm0, mm0, 44h
+@@:
+    DB      48h, 0fh, 0e7h, 07h        ;  movntq  [rdi], mm0
+    add     rdi, 8
+    loop    @B
+    mfence
+@SetDwords:
+    test    dl, 1
+    jz      @F
+    DB      0fh, 7eh, 07h              ;  movd    [rdi], mm0
+@@:
+    ret
+InternalMemSetMem32 ENDP
+
+    END